Abstract:

Based on the two-year successive data in the Qianyanzhou Experimental Area collected by small watershed technique and the located observation method, the hydrological process and the dynamics of mineral elements of the rainfall, throughflow, stemfall, crown interception and surface runoff for artificial Schima superba forest were studied, which was important to understand the dynamics of nutrient input and the function of artificial forest ecosystem in subtropical region. The results showed that the annual input of rainfall to the forest ecosystem was 1 388.75 mm, of which the input of throughflow, stemfall, crown interception and surface runoff were 1 099.40, 27.44, 261.93 mm and 44.48mm respectively, occupying 79.2%, 2%, 18.8% and 3.2% of the total input of rainfall. The total input nutrient of elements such as N, P, K, Ca, Mg, Fe, Mn, Sr, Zr, Na, Si and Ti dissolved in the rainfall was 349.86 kg·hm^-2 a^-1 , and the output of the nutrient was 72.929 kg·hm^-2 a^-1 , which indicated that the net nutrient accumulation in the forest ecosystem was 276.942 kg·hm^-2 a^-1.

Key words: Schima superba stand, Hydrological process, Nutrient dynamic, Dynamic process